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No. 770,648. PATENTED SEPT; 20, 1904 E. ossm. PROCESS OF MANUFACTURINGFAGED CARDBOARD.

APPLICATION FILED JUNE 4,1903- 2 SHEETS-SHEET 1.

' No. 770,648. PATENTBD SEPT. 20, 1904.

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PROCESS OF MANUFACTURING PAGED CARDBOARD.

- APPLICATION FILED JUNE 4,1903.

N0 MODEL. 2 SHEETS-SHEET 2.

Patented September 20, 1904. I

UNTTED STATES PATENT OFFICE.

ERNST OESER, OF SCHONEBERG, NEAR BERLIN, GERMANY.

PROCESS OF MANUFACTURING FACED CARDBOARD.

SPECIFICATION forming part of Letters Patent No. 770,648, datedSeptember 20, 1904:.

Application filed June 4, 1903. Serial No. 160,020. (No specimens.)

To a, whom it Wtcty concern:

Be it known that I, ERNsT OESER, manufacturer, a subject of the Emperorof Germany, residing at 19 Bahnstrasse, Schoneberg, near Berlin,Germany, have invented certain new and useful Improvements in theProcess of Manufacturing Faced Cardboard and the Like, of which thefollowing is a specification.

This invention relates to improvements in the process for manufacturingfaced cardboard and the like.

In the manufacture of cardboard or cartonpaper with cover sheets on bothsurfaces it is usual to apply the said cover-sheets at the beginning orend and to provide them with adhesive for fastening them. This method issuitable where the cover-sheets are sufliciently thick and whereappearance is a secondary consideration; but if the cover-sheets arethin and possibly colored the known method cannot be used, because themoisture of the adhesive substance penetrates the cover-sheets, which itsoils and causes to expand to such an extent that it becomes practicallyimpossible to manufacture the cardboard without creases.

The object of the present invention is to remove these disadvantages andto allow of manufacturing cardboard with thin and, if desired, coloredcover-sheets on both sides by first-uniting the sheets in groups to formtwo or more webs provided with cover-sheets and thereupon uniting thesaid webs to form cardboard without pasting the cover-sheets. Both thewebs with cover-sheets and those which may serve as filling or bodysheets can be made to pass over a heating-cylinder or over separateheating-cylinders.

In the annexed drawings various forms of apparatus for performing themethod described are shown as examples.

In the form of construction shown in Figure 1, a and Z) are the twoheating-cylinders over which the pasted paper sheets or webs pass. Thecylinders are mounted in the frame 0. d and @are the cover-sheets. f, g,and it are filling or body sheets. The filling-sheets f and g areprovided with adhesive by the devices 5 and 7c. The filling-sheet 7treceives its adhesive from the device Z. The paper webs or sheets orwebs are guided by suitable rollers m. As shown in Fig. 1, the sheet orweb 12, consisting of the cover-sheet d and the two filling-sheetsf and9, passes over the heatingroller (0 and is provided with adhesive on itsunder or reverse surface by the device 9" after passing over the saidheating-cylinder. The sheet or web 8, consisting of the cover-sheet eand the fillingsheet lb, passes over the heating-cylinder b, where it isunited to the band a, which has adhesive on its under surface, asaforesaid, so that the finished cardband a is produced. The cover-sheetsdo not,

therefore, come into contact with the adhesive material until the momentat which they are united with the other sheets, and since theyimmediately afterward pass over a heating cylinder or cylinders theadhesive material cannot have injurious effect on their texture orcolor.

In the form of the apparatus shown in Fig. 2 six paper sheets are unitedinstead of five. In this case the paper sheet or web a, consisting ofthe cover-sheet d and the filling-sheets f 9, passes over theheating-cylinder a, and the sheet or web 8, consisting of the coversheet 6 and the filling-sheets h and 00, passes over theheating-cylinder a and is provided with adhesive on its under or reversesurface by the device 7'. Both the sheet or web a and 8 pass over theheating-cylinder Z) for the purpose of being intimately connectedtogether and dried, and they leave the said cylinder in the form of afinished cardboard u. N 0 pasting or gluing of the cover-sheets (Z and 0takes place, and the said sheets do not come into contact with theadhesive material until at the moment at which they are united with theother sheets. It is obvious that a pasting device z can be provided forthe sheet It will be seen from these two examples that an indefinitenumber of paper sheets can be united to form the cardboard and that theycan be guided in any suitable manner without altering the principle ofthe invention. It will be understood that single-faced cardboard may bemanufactured in accordance with the above-described process by simplyomitting one of the facing-sheets.

I do not intend that my invention shall be restricted to the manufactureof double-faced or body sheets or webs to one another to form separategroups, providing one or two of said groups with a facing-sheet, thenuniting said groups to form the cardboard with the facing sheet orsheets outward.

2. The herein-described process of making faced cardboard, whichconsists in first applyinga facing sheet or web to one side of each oftwo body sheets or webs,then uniting the faced sheets or webs with otherbody sheets or webs, the faced sheets or webs being arranged to form theouter layers of the cardboard, and having their faced surfaces outward.

3. The herein-described process of making faced cardboard, whichconsists in first forniing a plurality of separate layers for the bodyof the cardboard, each of said layers being formed of one or more sheetsor webs, applying a facing sheet or web to one side of two ERNST OESER.

In presence of HENRY HASPER, WOLDEMAR HAUPT.

